Hexagon Flange Bolt Fully Threaded DIN 6921 A2-70 Black Stainless Steel
Key Features ✔️Conformity Certificate supplied as standard. ✔️Our famous CB10 blacking process. ✔️Free tech support, call & speak to one of our experts.
Diameter (D)
Pitch
DK (max)
S
K (max)
H (min)
M5
0.80
11.80
8.00-7.78
5.40
2.0
M6
1.00
14.20
10.00-9.78
6.60
2.5
M8
1.25
18.00
13.00-12.73
8.10
3.2
M10
1.50
22.30
15.00-14.73
9.20
3.6
Sizes in the table are in millimetres.
Non Serrated Black Stainless Steel Hex Flange Bolts from Carbolts Our fully threaded hexagon flange bolts are manufactured using A2 grade stainless steel (304) to DIN 6921 specification, finished with Carbolts CB10 black oxide coating - delivering a permanent, black corrosion-resistant flange bolt that performs as well as it looks. There's no chipping, no flaking, no rusting. Just a bolt that looks fantastic on day one and lasts for years and years.
Built-in load distribution, built to last The integrated circular flange beneath the hexagon head is the defining feature of this bolt - it spreads the clamping load across a wider bearing surface, reducing the risk of pull-through and in many applications eliminating the need for a separate washer altogether. The thread runs the entire length of the bolt, giving you maximum flexibility across varying material thicknesses without compromising grip or holding strength.
Driven with a standard hexagon spanner or socket, these bolts are quick to install and equally straightforward to remove — making them a reliable choice for assemblies that need to be accessed or adjusted over time.
Our CB10 black stainless hex flange bolts are especially in project builds, custom fabrication, automotive applications, camper van builds and anywhere a strong, clean black fixing is part of the finished look. They're equally at home on outdoor structures, brackets, enclosures and industrial assemblies where corrosion resistance is a must.
Why CB10 process works for you? Painted black eners can chip on installation and flake over within months of outdoor or high-humidity exposure. The CB10 black finish is chemically bonded directly to the stainless steel surface - it is not a coating that can be scraped off or damaged during installation. If you need a ener that looks sharp and stays that way in demanding environments, the CB10 finish is the one for you.
DIN 6921 Specification Supplied to DIN 6921 with metric thread, available in 'M' sizes from M5 to M10 with lengths ranging from 8mm to 100mm. For flange diameters and any other technical information see the table above. Compatible with standard metric nuts - also available in black stainless from Carbolts for a fully matched fixing.
Material: A2 Stainless Steel (Grade 304) Finish: CB10 Permanent Black Oxide Standard / Specification: DIN 6921 Thread: Metric Fully Threaded Head Style: Hexagon with integrated circular flange Drive: Hexagon spanner / socket Typical uses: Project builds, custom fabrication, motorsport, brackets, enclosures, outdoor structures, industrial assemblies, architectural metalwork, black-finish mechanical builds.
Click to download the Non Serrated Hexagon Flange Bolt technical information sheet.
